The Omani rial replaced the rial Saidi at par in 1973. The currency name was altered due to the regime change in 1970 and the subsequent change of the country's name. It is pegged to the US dollar at 1 Rail = 2.6008 US dollars.

The riel is the official currency of Cambodia despite most Cambodians preferring the US Dollar which has become the country's most common currency. In rural areas the riel is used for virtually all purchases, but in urban Cambodia and tourist areas the Riel notes are only used for fractional dollar amounts.